// TODO: Check if the ThenBy portion of this works
public static Func <IQueryable, IQueryable> BuildOrderByFunc(bool isThenBy, Type elementType, OrderByClause.OrderByItem obi)
{
var propertyPath = obi.PropertyPath;
bool isDesc = obi.IsDesc;
var paramExpr = Expression.Parameter(elementType, "o");
Expression nextExpr = paramExpr;
var propertyNames = propertyPath.Split('/').ToList();
propertyNames.ForEach(pn => {
var nextElementType = nextExpr.Type;
var propertyInfo = nextElementType.GetTypeInfo().GetProperty(pn);
if (propertyInfo == null)
{
throw new Exception("Unable to locate property: " + pn + " on type: " + nextElementType.ToString());
}
nextExpr = Expression.MakeMemberAccess(nextExpr, propertyInfo);
});
var lambdaExpr = Expression.Lambda(nextExpr, paramExpr);
var orderByMethod = GetOrderByMethod(isThenBy, isDesc, elementType, nextExpr.Type);
var baseType = isThenBy ? typeof(IOrderedQueryable <>) : typeof(IQueryable <>);
var func = BuildIQueryableFunc(elementType, orderByMethod, lambdaExpr, baseType);
return(func);
}
// TODO: Check if the ThenBy portion of this works
private static Func <IQueryable, IQueryable> BuildOrderByFunc(bool isThenBy, Type elementType, OrderByClause.OrderByItem obi)
{
bool isDesc = obi.IsDesc;
var paramExpr = Expression.Parameter(elementType, "o");
Expression nextExpr = paramExpr;
#region Modified code - Used Property.Properties instead of PropertyPath
obi.Property.Properties.ForEach(propertyInfo => {
nextExpr = Expression.MakeMemberAccess(nextExpr, propertyInfo);
});
#endregion
var lambdaExpr = Expression.Lambda(nextExpr, paramExpr);
var orderByMethod = GetOrderByMethod(isThenBy, isDesc, elementType, nextExpr.Type);
var baseType = isThenBy ? typeof(IOrderedQueryable <>) : typeof(IQueryable <>);
var func = BuildIQueryableFunc(elementType, orderByMethod, lambdaExpr, baseType);
return(func);
}